export default function toLunar(solarYear, solarMonth, solarDay) {
  //定义全局变量
  var CalendarData = new Array(100)
  var madd = new Array(12)
  var tgString = '甲乙丙丁戊己庚辛壬癸'
  var dzString = '子丑寅卯辰巳午未申酉戌亥'
  var numString = '一二三四五六七八九十'
  var monString = '正二三四五六七八九十冬腊'
  // var weekString = '日一二三四五六'
  // var sx = '鼠牛虎兔龙蛇马羊猴鸡狗猪'
  var cYear, cMonth, cDay, TheDate
  CalendarData = new Array(
    0xa4b,
    0x5164b,
    0x6a5,
    0x6d4,
    0x415b5,
    0x2b6,
    0x957,
    0x2092f,
    0x497,
    0x60c96,
    0xd4a,
    0xea5,
    0x50da9,
    0x5ad,
    0x2b6,
    0x3126e,
    0x92e,
    0x7192d,
    0xc95,
    0xd4a,
    0x61b4a,
    0xb55,
    0x56a,
    0x4155b,
    0x25d,
    0x92d,
    0x2192b,
    0xa95,
    0x71695,
    0x6ca,
    0xb55,
    0x50ab5,
    0x4da,
    0xa5b,
    0x30a57,
    0x52b,
    0x8152a,
    0xe95,
    0x6aa,
    0x615aa,
    0xab5,
    0x4b6,
    0x414ae,
    0xa57,
    0x526,
    0x31d26,
    0xd95,
    0x70b55,
    0x56a,
    0x96d,
    0x5095d,
    0x4ad,
    0xa4d,
    0x41a4d,
    0xd25,
    0x81aa5,
    0xb54,
    0xb6a,
    0x612da,
    0x95b,
    0x49b,
    0x41497,
    0xa4b,
    0xa164b,
    0x6a5,
    0x6d4,
    0x615b4,
    0xab6,
    0x957,
    0x5092f,
    0x497,
    0x64b,
    0x30d4a,
    0xea5,
    0x80d65,
    0x5ac,
    0xab6,
    0x5126d,
    0x92e,
    0xc96,
    0x41a95,
    0xd4a,
    0xda5,
    0x20b55,
    0x56a,
    0x7155b,
    0x25d,
    0x92d,
    0x5192b,
    0xa95,
    0xb4a,
    0x416aa,
    0xad5,
    0x90ab5,
    0x4ba,
    0xa5b,
    0x60a57,
    0x52b,
    0xa93,
    0x40e95
  )
  madd[0] = 0
  madd[1] = 31
  madd[2] = 59
  madd[3] = 90
  madd[4] = 120
  madd[5] = 151
  madd[6] = 181
  madd[7] = 212
  madd[8] = 243
  madd[9] = 273
  madd[10] = 304
  madd[11] = 334

  function GetBit(m, n) {
    return (m >> n) & 1
  }
  //农历转换
  function e2c() {
    TheDate =
      arguments.length != 3
        ? new Date()
        : new Date(arguments[0], arguments[1], arguments[2])
    var total, m, n, k
    var isEnd = false
    var tmp = TheDate.getYear()
    if (tmp < 1900) {
      tmp += 1900
    }
    total =
      (tmp - 1921) * 365 +
      Math.floor((tmp - 1921) / 4) +
      madd[TheDate.getMonth()] +
      TheDate.getDate() -
      38
    if (TheDate.getYear() % 4 == 0 && TheDate.getMonth() > 1) {
      total++
    }
    for (m = 0; ; m++) {
      k = CalendarData[m] < 0xfff ? 11 : 12
      for (n = k; n >= 0; n--) {
        if (total <= 29 + GetBit(CalendarData[m], n)) {
          isEnd = true
          break
        }
        total = total - 29 - GetBit(CalendarData[m], n)
      }
      if (isEnd) break
    }
    // !错误
    cYear = tgString.substr((solarYear - 1921) / 12, 1)
    cYear = cYear + dzString.substr((solarYear - 1921 - 3) % 12, 1)
    //console.log(cYear)
    cMonth = k - n + 1
    cDay = total
    if (k == 12) {
      if (cMonth == Math.floor(CalendarData[m] / 0x10000) + 1) {
        cMonth = 1 - cMonth
      }
      if (cMonth > Math.floor(CalendarData[m] / 0x10000) + 1) {
        cMonth--
      }
    }
  }

  function GetcDateString() {
    var tmp = ''
    if (cMonth < 1) {
      // tmp += "(闰)";
      tmp += monString.charAt(-cMonth - 1)
    } else {
      tmp += monString.charAt(cMonth - 1)
    }
    tmp += '月'
    tmp += cDay < 11 ? '初' : cDay < 20 ? '十' : cDay < 30 ? '廿' : '三十'
    if (cDay % 10 != 0 || cDay == 10) {
      tmp += numString.charAt((cDay - 1) % 10)
    }
    tmp = cYear + '年' + tmp
    return tmp
  }

  solarMonth = parseInt(solarMonth) > 0 ? solarMonth - 1 : 11
  e2c(solarYear, solarMonth, solarDay)
  return GetcDateString()
}
